Metal shears



Oct. 17, 1939.

S. K TAYLOR Str w) Patented Oct. 17, 1939 METAL SHEARS Samuel Y. Taylor, Houston, Tex., assignor, by direct and mesne assignments, to H-T Band Socket Corporation, Galveston, Tex, a corporation of Texas Application February 16, 1937, Serial No. 125,961

3 Claims.

The invention relates to a metal shear and particularly to such a shear for severing strip stock.

The principal object of the invention is to provide a new and improved construction for a shear that is capable of manual or power operation.

A more specific object is to provide a shear that may be fabricated from commercial stock material and yet to operate with a high degree of precision and facility.

A further object is to provide a shear that is simple, cheap, compact and easy to construct and operate.

A further object is to provide a shear that renders it practically impossible for injuries to the hands of an operator to occur.

It is also an object to provide a shear that will produce a rounded sheared end on the sheared stock whereby the end of such stock is devoid of sharp corners and shearing burs.

It is a further object to provide a shear in which the component parts carrying the shearing elements are self-aligning.

Other and further objects, together with the foregoing, will be apparent from the following description taken in connection with the drawing in which:

Fig. 1 is an elevation of the preferred form of the device of the invention.

Fig. 2 is a view taken at right angles to the view in Fig. 1 and showing parts in section.

Fig. 3 is a plan view of the device showing the stock guide in section.

Fig. 4 is a sectional view taken on line 44 of Fig. 2.

Fig. 5 is an assembly view showing the device equipped for foot operation.

Fig. 6 is a plan view of the end of a strip stock which has been sheared by the device of the invention.

Fig. 7 is similar to Fig. 6 but shows the nature of the sheared end when the stock is positioned asymmetrically within the device of the invention.

By way of illustration, but not limitation, reference is made to the use of the device of the invention in connection with the cutting of band ties, particularly such ties as are used in confining compressible materials such as cotton in compressed bales for shipment. In such case it is well known that the exposed ends of the ties are frequently contacted by the operators assisting in the bailing, transportation or storing of the commodity and that the burred edges and sharp corners on such exposed ends frequently cause flesh wounds of serious nature. It is also well known that injuries frequently occur from exposed shear blades used in cutting the strip stock to proper lengths. The device of the invention obviates these difficulties and others, as will be made apparent from further description.

In the assembly View of Fig. 5 the device is generally designated as l and comprises a body portion 2 having a flange 3, by means of which the device is attached to a table i as by screws 5. Telescoped upon body 2 is a sleeve 6 which is constantly urged upwardly by spring l. The upward movement of sleeve Ei'is limited by stop member 8 upon actuating arms secured to sleeve 6. The telescopic movement of the sleeve 6 over body 2 to efiect shearing of material placed in a notch ID in the sleeve is produced by means of a pull rod H interconnecting arm 9 and a foot operated lever i2 pivoted at if to a block M secured to the floor beneath the table t.

The details of construction of the device thus generally described is best illustrated in Fig. 2. While the upper end of the body 2 may be provided with a cutting edge, it is desirable to provide a removable cutter member by reducing the end portion of the body 9 at 28, thus providing a recess to receive an annular cutter blade 2| having a cutting edge 22. The outer diameter of blade 2| is the same as the diameter of body 2, whereby a smooth surface is presented for the sliding engagement of sleeve 6 thereon.

Sleeve 6 has a transverse slot in leaving a column 26 which interconnects the upper and lower portions of the sleeve. The upper face of this slot is provided with a recess 21 for receiving arcuate cutter 28 having a cutting edge 29 lying within the cylindrical surface defined by the innersurface of sleeve 6. Cutter 28 extends downwardly into slot l0 and preferably, though not necessarily, forms a V-shaped notch in which material to be out is placed.

An inner ring 30 and a cup 3! fit respectively inside and outside the upper end of sleeve 6 and retain cutter 28 in place, the respective elements forming the cutter head being held in a composite unit by means of a bolt 35 passing through ring 30, sleeve 6, cup 3! and arm 9.

An arcuate gauge Ml having a slotted opening 4! is attached to the cutter head by means of a cap screw 42. This gauge extends downwardly over notch l0 and serves to determine the distance stock to be sheared may be inserted be tween cutter elements 2! and 2B.

In Fig. 4 gauge 40 is shown as positioned so that the longitudinal axis of the stock 45 intersects the axis of body 2. With this adjustment and the indicated strip width the sheared end of stock will be symmetrically rounded as shown at 46 in Fig. 6.

If, on the other hand, gauge 40 is so adjusted that the center line of the stock and the axis of the body 2 do not intersect, the sheared end of stock 4'5 will be rounded asymmetrically as indicated at 41 in Fig. '7. In either event it is apparent that sharp corners are avoided.

The complementary end that is removed by shearing with the device above described will'have a concave sheared edge. This condition is immaterial if the removed end is to be discarded. If, however, it is desired to utilize both pieces that are produced by severing, two of the devices, as above described, may be closely juxtaposed and operated simultaneously whereby identical sheared ends will result. It should also be noted.

that if a plurality of the devices are so used the interval of movement during which the cutting of the respective devices will take place will be predetermined in such a manner that most practical results are accomplished. As an alternative to this described procedure a single device may be used and a second shearing operation may be formed upon the strip having the concave sheared end whereby the advantages of the invention are similarly realized.

In addition to the advantages heretofore pointed out, it should be noted that the described device is such that it is practically impossible for an operator to injure himself by getting his fingers between the cutter edges. In the pivot blade type shear this danger is inherent unless inconvenient shear guards are constantly used. It should also be noted that in the device with telescoped shear members the relatively removable parts are inherently self-guiding. Also, since only a small portion of cutting edge 22 is used at any one time, cutter member 2| may be rotated in its socket 211 to present a new edge when a portion previously used becomes dull.

What is claimed is:

1. In a shears in combination a cylindrical body member having a peripheral cutting edge on one end thereof, a concentric sleeve slidably positioned upon said body, said sleeve having a transverse slot through the walls thereof, a cutter blade mounted in said slot, means secured to said sleeve for holding said blade with its cutting edge lying in the cylindrical surface defined by the inner wall of said sleeve, means tending to normally hold said sleeve with the slot therein displaced from the end of the body member, and means for sliding the sleeve upon said body to move said blades. in shearing relation.

2. In a shears the combination of a body having a peripheral cutting edge thereon, a sleeve slidingly fitting upon said body and having a transverse slot therein, a cutting edge in said slot adapted to be moved into shearing relation with the end of said body, means for moving said sleeve upon said body to move said cutting edges in shearing relation, and gauge means mounted on said sleeve for determining the position of the workpiece in said slot.

3. In a shears a body member having a peripheral cutting edge on one end thereof, a cutting head telescopically mounted upon said body and having a transverse slot in the walls thereof, a cutter blade mounted in said slot and having its cutting edge movable into shearing relation with the cutting edge on the body member, and a cup member slidably fitting over the end of the cutting head and adapted to hold the cutter blade within the head.

SAMUEL Y. TAYLOR. 

